var vm = new Vue({
    el: '#app',
    data: {
        currentIndex: 0, //保存点击的按钮下标
        list: [
            { pic: '', name: '首页' },
            { pic: '', name: '爆爆团' },
            { pic: '', name: '订单' },
            { pic: '', name: '我的' },
        ]
    },
    methods: {
        handleClick(index) {
            this.currentIndex = index;//保存点击的按钮下标
        }
    }
})